INFO: task kworker/0:0:23331 blocked for more than 143 seconds.
Not tainted 5.2.0+ #37
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:0 D24536 23331 2 0x80004000
Workqueue: events linkwatch_event
Call Trace:
context_switch /kernel/sched/core.c:3254 [inline]
__schedule+0x8b7/0xcd0 /kernel/sched/core.c:3880
schedule+0x12f/0x1d0 /kernel/sched/core.c:3944
schedule_preempt_disabled+0x11/0x20 /kernel/sched/core.c:4003
__mutex_lock_common+0x124f/0x2840 /kernel/locking/mutex.c:1003
__mutex_lock /kernel/locking/mutex.c:1073 [inline]
mutex_lock_nested+0x1b/0x30 /kernel/locking/mutex.c:1088
rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
linkwatch_event+0xe/0x60 /net/core/link_watch.c:242
process_one_work+0x83b/0x1150 /kernel/workqueue.c:2269
worker_thread+0xc01/0x1630 /kernel/workqueue.c:2415
kthread+0x332/0x350 /kernel/kthread.c:255
ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352
INFO: task kworker/0:2:26363 blocked for more than 143 seconds.
Not tainted 5.2.0+ #37
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:2 D23616 26363 2 0x80004000
Workqueue: events switchdev_deferred_process_work
Call Trace:
context_switch /kernel/sched/core.c:3254 [inline]
__schedule+0x8b7/0xcd0 /kernel/sched/core.c:3880
schedule+0x12f/0x1d0 /kernel/sched/core.c:3944
schedule_preempt_disabled+0x11/0x20 /kernel/sched/core.c:4003
__mutex_lock_common+0x124f/0x2840 /kernel/locking/mutex.c:1003
__mutex_lock /kernel/locking/mutex.c:1073 [inline]
mutex_lock_nested+0x1b/0x30 /kernel/locking/mutex.c:1088
rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
switchdev_deferred_process_work+0xe/0x20 /net/switchdev/switchdev.c:74
process_one_work+0x83b/0x1150 /kernel/workqueue.c:2269
worker_thread+0xc01/0x1630 /kernel/workqueue.c:2415
kthread+0x332/0x350 /kernel/kthread.c:255
ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352
INFO: task kworker/0:4:935 blocked for more than 143 seconds.
Not tainted 5.2.0+ #37
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:4 D27768 935 2 0x80004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch /kernel/sched/core.c:3254 [inline]
__schedule+0x8b7/0xcd0 /kernel/sched/core.c:3880
schedule+0x12f/0x1d0 /kernel/sched/core.c:3944
schedule_preempt_disabled+0x11/0x20 /kernel/sched/core.c:4003
__mutex_lock_common+0x124f/0x2840 /kernel/locking/mutex.c:1003
__mutex_lock /kernel/locking/mutex.c:1073 [inline]
mutex_lock_nested+0x1b/0x30 /kernel/locking/mutex.c:1088
rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
addrconf_dad_work+0xcb/0x1d20 /net/ipv6/addrconf.c:4032
process_one_work+0x83b/0x1150 /kernel/workqueue.c:2269
worker_thread+0xc01/0x1630 /kernel/workqueue.c:2415
kthread+0x332/0x350 /kernel/kthread.c:255
ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352
INFO: task kworker/1:3:997 blocked for more than 143 seconds.
Not tainted 5.2.0+ #37
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:3 D24536 997 2 0x80004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch /kernel/sched/core.c:3254 [inline]
__schedule+0x8b7/0xcd0 /kernel/sched/core.c:3880
schedule+0x12f/0x1d0 /kernel/sched/core.c:3944
schedule_preempt_disabled+0x11/0x20 /kernel/sched/core.c:4003
__mutex_lock_common+0x124f/0x2840 /kernel/locking/mutex.c:1003
__mutex_lock /kernel/locking/mutex.c:1073 [inline]
mutex_lock_nested+0x1b/0x30 /kernel/locking/mutex.c:1088
rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
addrconf_dad_work+0xcb/0x1d20 /net/ipv6/addrconf.c:4032
process_one_work+0x83b/0x1150 /kernel/workqueue.c:2269
worker_thread+0xc01/0x1630 /kernel/workqueue.c:2415
kthread+0x332/0x350 /kernel/kthread.c:255
ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352
INFO: task syz-executor.2:1000 blocked for more than 144 seconds.
Not tainted 5.2.0+ #37
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D20280 1000 1 0x00004004
Call Trace:
context_switch /kernel/sched/core.c:3254 [inline]
__schedule+0x8b7/0xcd0 /kernel/sched/core.c:3880
schedule+0x12f/0x1d0 /kernel/sched/core.c:3944
schedule_preempt_disabled+0x11/0x20 /kernel/sched/core.c:4003
__mutex_lock_common+0x124f/0x2840 /kernel/locking/mutex.c:1003
__mutex_lock /kernel/locking/mutex.c:1073 [inline]
mutex_lock_nested+0x1b/0x30 /kernel/locking/mutex.c:1088
rtnl_lock /net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0xae4/0xe60 /net/core/rtnetlink.c:5220
netlink_rcv_skb+0x1f0/0x460 /net/netlink/af_netlink.c:2477
rtnetlink_rcv+0x1c/0x20 /net/core/rtnetlink.c:5241
netlink_unicast_kernel /net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x809/0x9a0 /net/netlink/af_netlink.c:1328
netlink_sendmsg+0xa70/0xd30 /net/netlink/af_netlink.c:1917
sock_sendmsg_nosec /net/socket.c:637 [inline]
sock_sendmsg /net/socket.c:657 [inline]
__sys_sendto+0x4ad/0x680 /net/socket.c:1952
__do_sys_sendto /net/socket.c:1964 [inline]
__se_sys_sendto /net/socket.c:1960 [inline]
__x64_sys_sendto+0xe5/0x100 /net/socket.c:1960
do_syscall_64+0xfe/0x140 /arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413663
Code: 24 00 85 c0 0f 85 f7 fc ff ff 31 c9 31 f6 41 b9 b0 20 41 00 41 b8 a4 d6 65 00 ba 04 00 00 00 bf 9a 38 44 00 ff 15 15 a0 24 00 <85> c0 0f 85 cf fc ff ff 45 31 c9 31 c9 31 f6 41 b8 70 d6 65 00 ba
RSP: 002b:00007ffde8bb39c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000413663
RDX: 0000000000000034 RSI: 0000000000a70070 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffde8bb39d0 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 00000000004be615
INFO: task syz-executor.1:1024 blocked for more than 144 seconds.
Not tainted 5.2.0+ #37
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28152 1024 994 0x00004004
Call Trace:
context_switch /kernel/sched/core.c:3254 [inline]
__schedule+0x8b7/0xcd0 /kernel/sched/core.c:3880
schedule+0x12f/0x1d0 /kernel/sched/core.c:3944
schedule_preempt_disabled+0x11/0x20 /kernel/sched/core.c:4003
__mutex_lock_common+0x124f/0x2840 /kernel/locking/mutex.c:1003
__mutex_lock /kernel/locking/mutex.c:1073 [inline]
mutex_lock_nested+0x1b/0x30 /kernel/locking/mutex.c:1088
rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
sock_do_ioctl+0x1d6/0x300 /net/socket.c:1051
sock_ioctl+0x4f8/0x730 /net/socket.c:1189
do_vfs_ioctl+0x7d4/0x18f0 /fs/ioctl.c:46
ksys_ioctl /fs/ioctl.c:713 [inline]
__do_sys_ioctl /fs/ioctl.c:720 [inline]
__se_sys_ioctl /fs/ioctl.c:718 [inline]
__x64_sys_ioctl+0xe3/0x120 /fs/ioctl.c:718
do_syscall_64+0xfe/0x140 /arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459819
Code: Bad RIP value.
RSP: 002b:00007fa3fc066c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459819
RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000005
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa3fc0676d4
R13: 00000000004c3114 R14: 00000000004d65e0 R15: 00000000ffffffff
INFO: task syz-executor.4:1021 blocked for more than 144 seconds.
Not tainted 5.2.0+ #37
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D26744 1021 1 0x00004004
Call Trace:
context_switch /kernel/sched/core.c:3254 [inline]
__schedule+0x8b7/0xcd0 /kernel/sched/core.c:3880
schedule+0x12f/0x1d0 /kernel/sched/core.c:3944
schedule_preempt_disabled+0x11/0x20 /kernel/sched/core.c:4003
__mutex_lock_common+0x124f/0x2840 /kernel/locking/mutex.c:1003
__mutex_lock /kernel/locking/mutex.c:1073 [inline]
mutex_lock_nested+0x1b/0x30 /kernel/locking/mutex.c:1088
rtnl_lock /net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0xae4/0xe60 /net/core/rtnetlink.c:5220
netlink_rcv_skb+0x1f0/0x460 /net/netlink/af_netlink.c:2477
rtnetlink_rcv+0x1c/0x20 /net/core/rtnetlink.c:5241
netlink_unicast_kernel /net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x809/0x9a0 /net/netlink/af_netlink.c:1328
netlink_sendmsg+0xa70/0xd30 /net/netlink/af_netlink.c:1917
sock_sendmsg_nosec /net/socket.c:637 [inline]
sock_sendmsg /net/socket.c:657 [inline]
__sys_sendto+0x4ad/0x680 /net/socket.c:1952
__do_sys_sendto /net/socket.c:1964 [inline]
__se_sys_sendto /net/socket.c:1960 [inline]
__x64_sys_sendto+0xe5/0x100 /net/socket.c:1960
do_syscall_64+0xfe/0x140 /arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413663
Code: 24 00 85 c0 0f 85 f7 fc ff ff 31 c9 31 f6 41 b9 b0 20 41 00 41 b8 a4 d6 65 00 ba 04 00 00 00 bf 9a 38 44 00 ff 15 15 a0 24 00 <85> c0 0f 85 cf fc ff ff 45 31 c9 31 c9 31 f6 41 b8 70 d6 65 00 ba
RSP: 002b:00007ffc49e1d008 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000413663
RDX: 0000000000000028 RSI: 0000000000a70070 RDI: 0000000000000003
RBP: 00007ffc49e1d070 R08: 00007ffc49e1d010 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007ffc49e1d378 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/1057:
#0: 0000000069a3e027 (rcu_read_lock){....}, at: rcu_lock_acquire+0x4/0x30 /./include/linux/rcupdate.h:207
2 locks held by rsyslogd/7612:
#0: 00000000f082bf6c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x243/0x2e0 /fs/file.c:801
#1: 00000000d4d2de17 (&rq->lock){-.-.}, at: rq_lock /kernel/sched/sched.h:1207 [inline]
#1: 00000000d4d2de17 (&rq->lock){-.-.}, at: __schedule+0x138/0xcd0 /kernel/sched/core.c:3832
2 locks held by getty/7703:
#0: 00000000cb27d287 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 /drivers/tty/tty_ldisc.c:272
#1: 00000000d5913e37 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ee/0x1c80 /drivers/tty/n_tty.c:2156
2 locks held by getty/7704:
#0: 0000000073ea0da4 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 /drivers/tty/tty_ldisc.c:272
#1: 00000000549cbc7b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ee/0x1c80 /drivers/tty/n_tty.c:2156
2 locks held by getty/7705:
#0: 00000000a0874f1d (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 /drivers/tty/tty_ldisc.c:272
#1: 00000000e3315b47 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ee/0x1c80 /drivers/tty/n_tty.c:2156
2 locks held by getty/7706:
#0: 00000000c91ea688 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 /drivers/tty/tty_ldisc.c:272
#1: 00000000d3d21174 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ee/0x1c80 /drivers/tty/n_tty.c:2156
2 locks held by getty/7707:
#0: 000000002740e59c (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 /drivers/tty/tty_ldisc.c:272
#1: 00000000ead2fa2e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ee/0x1c80 /drivers/tty/n_tty.c:2156
2 locks held by getty/7708:
#0: 0000000016a62bed (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 /drivers/tty/tty_ldisc.c:272
#1: 00000000bb411515 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ee/0x1c80 /drivers/tty/n_tty.c:2156
2 locks held by getty/7709:
#0: 00000000eaeb13eb (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 /drivers/tty/tty_ldisc.c:272
#1: 00000000eaccbe50 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ee/0x1c80 /drivers/tty/n_tty.c:2156
4 locks held by kworker/u4:6/29302:
#0: 0000000074da2451 ((wq_completion)netns){+.+.}, at: spin_unlock_irq /./include/linux/spinlock.h:388 [inline]
#0: 0000000074da2451 ((wq_completion)netns){+.+.}, at: process_one_work+0x7b0/0x1150 /kernel/workqueue.c:2242
#1: 000000003ec8b945 (net_cleanup_work){+.+.}, at: process_one_work+0x7ee/0x1150 /kernel/workqueue.c:2244
#2: 000000003669b6ec (pernet_ops_rwsem){++++}, at: cleanup_net+0xf0/0xb30 /net/core/net_namespace.c:556
#3: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
3 locks held by kworker/0:0/23331:
#0: 00000000f009bf79 ((wq_completion)events){+.+.}, at: spin_unlock_irq /./include/linux/spinlock.h:388 [inline]
#0: 00000000f009bf79 ((wq_completion)events){+.+.}, at: process_one_work+0x7b0/0x1150 /kernel/workqueue.c:2242
#1: 00000000e1eeafa6 ((linkwatch_work).work){+.+.}, at: process_one_work+0x7ee/0x1150 /kernel/workqueue.c:2244
#2: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
3 locks held by kworker/0:2/26363:
#0: 00000000f009bf79 ((wq_completion)events){+.+.}, at: spin_unlock_irq /./include/linux/spinlock.h:388 [inline]
#0: 00000000f009bf79 ((wq_completion)events){+.+.}, at: process_one_work+0x7b0/0x1150 /kernel/workqueue.c:2242
#1: 00000000d16f7f97 (deferred_process_work){+.+.}, at: process_one_work+0x7ee/0x1150 /kernel/workqueue.c:2244
#2: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
3 locks held by kworker/0:4/935:
#0: 00000000d18db68f ((wq_completion)ipv6_addrconf){+.+.}, at: spin_unlock_irq /./include/linux/spinlock.h:388 [inline]
#0: 00000000d18db68f ((wq_completion)ipv6_addrconf){+.+.}, at: process_one_work+0x7b0/0x1150 /kernel/workqueue.c:2242
#1: 000000005a7b46d2 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x7ee/0x1150 /kernel/workqueue.c:2244
#2: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
3 locks held by kworker/1:3/997:
#0: 00000000d18db68f ((wq_completion)ipv6_addrconf){+.+.}, at: spin_unlock_irq /./include/linux/spinlock.h:388 [inline]
#0: 00000000d18db68f ((wq_completion)ipv6_addrconf){+.+.}, at: process_one_work+0x7b0/0x1150 /kernel/workqueue.c:2242
#1: 000000001d7bc42f ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x7ee/0x1150 /kernel/workqueue.c:2244
#2: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
1 lock held by syz-executor.2/1000:
#0: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnl_lock /net/core/rtnetlink.c:72 [inline]
#0: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0xae4/0xe60 /net/core/rtnetlink.c:5220
1 lock held by syz-executor.1/1024:
#0: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 /net/core/rtnetlink.c:72
1 lock held by syz-executor.4/1021:
#0: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnl_lock /net/core/rtnetlink.c:72 [inline]
#0: 0000000080c33a81 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0xae4/0xe60 /net/core/rtnetlink.c:5220
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.2.0+ #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack /lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x2f8 /lib/dump_stack.c:113
nmi_cpu_backtrace+0xb0/0x1a0 /lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x14c/0x240 /lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x10/0x20 /arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace+0x17/0x20 /./include/linux/nmi.h:146
check_hung_uninterruptible_tasks /kernel/hung_task.c:205 [inline]
watchdog+0xbcc/0xbe0 /kernel/hung_task.c:289
kthread+0x332/0x350 /kernel/kthread.c:255
ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 /./arch/x86/include/asm/irqflags.h:60